通过经纬度数据，直接计算2点之间的距离，包含VC、VB源代码，以及Excel发式求解的方法。-By latitude and longitude data, direct calculation of the distance between 2 points, including VC, VB source code, as well as Excel hair solution approach.

在vb环境中调用Excel文件，通过手动进行添加数据。-in vb environment called Excel documents, add data manually.